Word Finder - orbit

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A circular or elliptical path of one object around another object, particularly in astronomy and space travel.

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The Moon's orbit around the Earth takes nearly one month to complete.

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A sphere of influence; an area of control.

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In the post WWII era, several eastern European countries came into the orbit of the Soviet Union.

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The course of one's usual progression, or the extent of one's typical range.

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The convenience store was a heavily travelled point in her daily orbit, as she purchased both cigarettes and lottery tickets there.

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The bony cavity containing the eyeball; the eye socket.

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A mathematical function that describes the wave-like behavior of an electron in an atom; area of the highest probability of electron´s occurrence around the atom's nucleus.

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A collection of points related by the evolution function of a dynamical system.

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The subset of elements of a set X to which a given element can be moved by members of a specified group of transformations that act on X.

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A state of increased excitement, activity, or anger.

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Dad went into orbit when I told him that I'd crashed the car.

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A path for the ball on the outer edge of the playfield, usually connected so that the ball entering in one end will come out of the other.

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To circle or revolve around another object.

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The Earth orbits the Sun.

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To move around the general vicinity of something.

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The harried mother had a cloud of children orbiting her, begging for sweets.

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To place an object into an orbit around a planet.

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A rocket was used to orbit the satellite.

Ordinary meteors, in the region of the earth's orbit, appear to be separated by intervals of about 250 m.

Encke, the astronomer who first investigated its orbit and showed its periodicity.

It is now known to correspond to the actual orbit of the planet round the sun.

Another element is the time of revolution of the body in its orbit, called its period.

The plane of the orbit is called the ecliptic.

If a point be in motion in any orbit and with any velocity, and if, at each instant, a line be drawn from a fixed point parallel and equal to the velocity of the moving point at that instant, the extremities of these lines will lie on a curve called the hodograph.

The ellipse is therefore the only closed orbit.

This, and the inclination of the orbit being given, we have all the geometrical data necessary to compute the coordinates of the planet itself.

As the entire time required for light to pass over the radius of the earth's orbit is only about 500 seconds, this error is fatal to the method.

With this position and speed the elements of the orbit can again be determined.

Since the orbit is unchanged so long as no disturbing force acts, it follows that the elements determined by means of the two sets of values of the variables are in this case the same.

It will be seen that unless the conditions be exactly adjusted for a circular orbit the particle will either recede to infinity or approach the pole asymptotically.

Hence a tacit understanding between Bismarck and Austria that the latter should profit by Italian resentment against France to draw Italy into the orbit of the Austro-German alliance.

Dorsolaterally the basisphenoid is joined by the alisphenoid, which forms most of the posterior wall of the orbit.

Let AB be the major axis of the orbit, B the pericentre, F the focus or centre of motion, P the position of the body.

Elliptic orbits, and a parabolic orbit considered as the special case when the eccentricity of the ellipse is 1, are almost the only ones the astronomer has to consider, and our attention will therefore be confined to them in the present article.

If the attraction of a central body is not the only force acting on the moving body, the orbit will deviate from the form of a conic section in a degree depending on the amount of the extraneous force; and the curve described may not be a re-entering curve at all, but one winding around so as to form an indefinite succession of spires.

In all the cases which have yet arisen in astronomy the extraneous forces are so small compared with the gravitation of the central body that the orbit is approximately an ellipse, and the preliminary computations, as well as all determinations in which a high degree of precision is not necessary, are made on the hypothesis of elliptic orbits.

Let the curve represent an elliptic orbit, AB being the major axis, DE the minor axis, and F the focus in which the centre of attraction is situated, which centre we shall call the sun.

From the properties of the ellipse, A is the pericentre or nearest point of the orbit to the centre of attraction and B the apocentre or most distant point.

To do this the actual speed in the orbit, and in a yet higher degree the angular speed around F, must be greatest at pericentre, and continually diminish till the apocentre is reached.

Two elements define the position of the plane passing through the attracting centre in which the orbit lies.

One of these is the position of the line MN through the sun at F in which the plane of the orbit cuts some fundamental plane of reference, commonly the ecliptic. This is called the line of nodes, and its position is specified by the angle which it makes with some fixed line FX in the fundamental plane.

Orbit open behind; and ridges of lower cheek-teeth generally terminating in small loops.

Skull elevated and compressed; with the orbit and temporal fossa widely continuous, there being no true post-orbital process from the frontal bone.

If S is the area of the orbit described in time T by an electron of charge e, the moment of the equivalent magnet is M = eST; and the change in the value of M due to an external field H is shown to be OM = - He'S/47rm, m being the mass of the electron.

The year 1787 was rendered further memorable by Laplace's announcement on the 19th of November (Memoirs, 1786), of the dependence of lunar acceleration upon the secular changes in the eccentricity of the earth's orbit.

This will be evident if we consider that, since radii vectores of the hodograph represent velocities in the orbit, the elementary arc between two consecutive radii vectores of the hodograph represents the velocity which must be compounded with the velocity of the moving point at the beginning of any short interval of time to get the velocity at the end of that interval, that is to say, represents the change of velocity for that interval.

Hence the elementary arc divided by the element of time is the rate of change of velocity of the moving-point, or in other words, the velocity in the hodograph is the acceleration in the orbit.

Every orbit must clearly have a hodograph, and, conversely, every hodograph a corresponding orbit; and, theoretically speaking, it is possible to deduce the one from the other, having given the other circumstances of the motion.

The most plausible explanation of this is that one or more masses of matter move around the sun, whose action, whether they are inside or outside the orbit of Mercury, would produce the required modification in the force.

The explanation of these recurring phenomena is that a great cloud or distended stream of meteors revolves around the sun in a period of 331years, and that one portion of the elliptical orbit intersects that of the earth.

As the meteors have been numerously visible in five or six successive years it follows they must be pretty densely distributed along a considerable arc of their orbit.

It also follows that, as some of the meteors are seen annually, they must be scattered around the whole orbit.

Biela's comet of 1826, which had a period of 6.7 years, presented a significant resemblance of orbit with that of the meteors, but the comet has not been seen since 1852 and has probably been resolved into the meteoric stream of Andromedids.

He calculated an orbit for the comet of 1 759 (Halley's), reduced Lacaille's observations of 515 zodiacal stars, and was, in 1763, elected a member of the Academy of Sciences.

From the time of his first introduction to Tycho he had devoted himself to the investigation of the orbit of Mars, which, on account of its relatively large eccentricity, had always been especially recalcitrant to theory, and the results appeared in Astronomia nova ainoXayrgrii, seu Physica coelestis tradita commentariis de motibus stellae Martis (Prague, 1609).

The skull resembles that of the lion and tiger, but is much broader in proportion to its length, and may be identified by the presence of a tubercle on the inner edge of the orbit.

This comet has given rise to a longer series of investigations than any other, owing to Encke's result that the orbit was becoming smaller, and the revolutions therefore accelerated, by some unknown cause, of which the most plausible was a resisting medium surrounding the sun.

As this comet is almost the only one that passes within the orbit of Mercury, it is quite possible that it alone would show the effect of such a medium.

Notwithstanding the rude character of the apparatus at his disposal, Horrocks was enabled by his observation of it to introduce some important corrections into the elements of the planet's, orbit, and to reduce to its exact value the received estimate of its apparent diameter.

The Solar Astronomical Year Is The Period Of Time In Which The Earth Performs A Revolution In Its Orbit About The Sun, Or Passes From Any Point Of The Ecliptic To The Same Point Again; And Consists Of 365 Days 5 Hours 48 Min.

The "line of apsides" is that which joins them, forming the major axis of the orbit.

Post-orbital processes of the frontals exist in squirrels, marmots and hares; but in all other genera they are rudimentary or altogether absent; and the zygoma seldom sends upwards a corresponding process, so that the orbit is more or less completely continuous with the temporal fossa.

The lachrymal forj amen is always within the orbital margin; and in many species the infra-orbital foramen is very large (in some as large as the orbit) and transmits part of the masseter muscle.

The front root of the zygomatic arch is nearly vertical, and placed so far back that it is above the second molar, while the orbit - a unique feature among rodents - is almost completely surrounded by bone.

It aimed at a close alliance with the house of Austria, with the double object of drawing Sweden within its orbit and overawing the Porte by the conjunction of the two great Catholic powers of central Europe.

It may be considered as arising from a semi-annual variation in the eccentricity of the moon's orbit and the position of its perigee.

In both genera, as in the okapi, there is a vacuity in front of the orbit.

In the skull there are two orifices to the lachrymal duct, situated on or inside the rim of the orbit.